Process for making duplicate phonograph-records.



PATENTED JUNE 4, 1907.

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r 'IHI "mm? UW/l/l/l/A llllmll AFPLIOATION FILED MAY 16, 1906. RENEWED APE. 4, 1907- UNITED STATES PATENT FFTQE,

J OBLAS W. AYLSWORTH, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO NEW JERSEY, PATENT COMPANY, OF WEST ORANGE, NEW JERSEY, A CORPO- RATION OF NEW JERSEY.

PROCESS FOR MAKlNG DUPLICATE PHONDGRAPH-RECORDS.

Specification of Letters Patent.

Patented June 4, 1907.

duplication filed May 16,1906. Renewed April 4, 1907. Serial No. 366329.

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Be it known that l, JONAS W. ArLswoRrn, a citizen of the United Stntes, residing at 223 Midland avenue, East Orange, county of Essex, l State of New Jersey, have invented n cer un new and useful Process for Marking Duplicate Phonograph-Records, of which the following is n description.

In an application for Letters Patent, filed May 11th, 1906, Serial No. 316,250, I describe an improved process and apparatus for making duplicnte phonograph records, wherein u hcnted mold is rot-nted at a high speed, and molten llltllll'lrtl is introduced therein, so as to be forcibly distributed uniformly over the bore otthe mold by IlnSOll of the centrifugal force developed, any nir or gas bubbles being forced rddiidly inwnrd so as to make it very perl cet molded surface, and the mold being subseiplcntly cooled while still being routed, so as to set and burden the molten mnterinl.

' In the (linking of duplicate phonograph records by the process nnd apparatus described in snid application, 1 contemplntc using molds of the type now employed, which are nbout l of an inch in thickness, and presenting at mass of metal somewhnt greater than that contnined in the desired duplicate rec- (lonserpicntly, il it were attempted to make duplicate records from cold molds of this type, the molten inn-tcrinl introduced within the mold will be quickly chilled on the record surllice, resulting in the formation of air bubbles and preventing the uniform distribution ol l be material, ILS takes place when lhe mold is hented to permit the molten illitlerinl to nmintuin its lluid condition while it is being distributed.

My present application rchttes to an improved process by which duiplicnte phonograph records can be PILXlUUlt in cold molds, and to this end the invention consists in making use ol n mold having very thin wells,

and in inlrmlueing therein the molten matlerinl .d at high lemperl-llurc, whereby the bent imported to the mold will l'nise the lem pel'nllil'e thereol to or shove the. melting point of the llHtltl'llll, so lllitl the bitter will retain its lluid condition nnd will permit ull nir nnd gns bubbles to be driven rndiully inward us with the process described in my snid npplicntion.

in order that the invention may be better understood, attention is directed to the sccomponying drawing, forming part of this s ecification, and in which- Figure 1, is a longitudinal sectional view through a part of an apparatus similar to that disclosed in said application, showing a single mold, and means for introducing charges of molten materiel therein, Fig. 2, 21

section on the line 2-2 of Fig. 1, Fig. 3, a

side elevation of the mold, and Fig. 4, an enlarged detail view of the end of the mold. In all of the above views, corresponding parts are represented by the same numerals ol reference.

l1 represent idlers to support the mold 2, the latter being rotated by it driving roller The mold 2 is shown as being provided -with very thin walls, sayztbout flyof an inch in thickness, so as to present a body of minimum heat absorbing capacity commensurate with-the desired strength and rigidity. The movable end plate 4, is llenged and tits tightly over the open end of the mold, the elasticity of the flange being provided by slitting the some at .')'5, as shown. The pernnment flange 6, is of the usual form and is provided with the desired engraved matter for identifying the record, as will be understood. Any suitable means may be employed for introducing clntrges of molten lllltltllttl into the mold, as'ior example, a pump 7, the plunger 8 of which is ndnpted to be moved below on opening 9, 'to which is supplied the molten material. This materiel may be of any suitable composition, as for example, either the special want-like malerinls disclosed in my patents, No. 676,111 of dune llth, 1901, or No. 782,375 of February 14th, 1005. The temperature at which the molten material ishen ted in carrying the process into ell'ect depends, obviously, upon -lhe character of the material and upon the heat absorbing cnpscitv of the mold, but

wilhn mold hnving wells ol an inch in thickness, the nm-intdining of the material at u temperature oi F. above its melting point when introduced into the mold will be :n'nply sullicieut for the purpose. The imporlzinl consideration is that there shall be sullicient bulk of molten mnlcrinl heated to n sulliciently hi h lempernture, us in compnri son with the tent absorbing cnpncitv of the mold, to raise the temperature of the mold ICC , the application 01' coolin to or above the melting point of the material, before heat is absorbed from the material sufficiently to lower its temperature to the congealing point, so that the material will retain its fluid condition while it is bein distributed over the bore of the mold, and Will permit air and gas bubbles to be forced radially inward, as I described in my said application. After the material has been thus distributed uniformly around the interior of the mold, the latter maybe forcibly and rapidly cooled in any suitable way, such as by pads for the same, as I describe in said application. When the material has been thus solidified the finished duplicate record, after it has contracted away from the mold, may be removed therefrom, and its bore suitably finished, if necessary.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is as follows 1. The process of making duplicate phonograph records, whichconsists in rapidly rotating a thin tubular mold, and in introducing therein a charge of very hot molten ma- .terial, whereby the temperature of the mold will be raised to orabove the melting point of the material, substantially as set forth.

2. The process of making duplicate phonograph records, which. consists in rapidly ro tatirig a thin tubular mold, and in introducing therein a charge of very hot molten ma terial, exceeding, the mold in bulk, and presenting sufiicient excess heating capacity to raise the temperature'of the mold to or above the melting point of the material, substantially as set forth. v

This specification signed and witnessed this 14th day of May, 1906.

JONAS w. AYLSWORTH. 

